DESIGN OF DUAL-MODE PENTAGON PATCH RESONATOR FILTER USING ASYMMETRICALλ/4 INTERDIGITAL COUPLED LINES

摘要

In this letter, an improved coupling mechanism using asymmetrical λ/4 interdigital coupled lines is introduced and applied to design dual-mode pentagon patch resonator filter. This perturbation method is easy to realize without occupying extra space while the patch resonator structure remains intact. Coupling characteristics and transmission characteristics of this new filter are discussed, and the design methodology is verified by measurements.